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From:   David Howells <dhowells@redhat.com>
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To:     Xiubo Li <xiubli@redhat.com>
Cc:     dhowells@redhat.com, Matthew Wilcox <willy@infradead.org>,
        "David S. Miller" <davem@davemloft.net>,
        Eric Dumazet <edumazet@google.com>,
        Jakub Kicinski <kuba@kernel.org>,
        Paolo Abeni <pabeni@redhat.com>,
        Al Viro <viro@zeniv.linux.org.uk>,
        Christoph Hellwig <hch@infradead.org>,
        Jens Axboe <axboe@kernel.dk>, Jeff Layton <jlayton@kernel.org>,
        Christian Brauner <brauner@kernel.org>,
        Chuck Lever III <chuck.lever@oracle.com>,
        Linus Torvalds <torvalds@linux-foundation.org>,
        netdev@vger.kernel.org, linux-fsdevel@vger.kernel.org,
        linux-kernel@vger.kernel.org, linux-mm@kvack.org,
        Ilya Dryomov <idryomov@gmail.com>, ceph-devel@vger.kernel.org
Subject: Re: [RFC PATCH v2 37/48] ceph: Use sendmsg(MSG_SPLICE_PAGES) rather than sendpage()
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Date:   Mon, 03 Apr 2023 09:32:46 +0100
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Xiubo Li <xiubli@redhat.com> wrote:

> On 3/30/23 14:48, David Howells wrote:
> > Xiubo Li <xiubli@redhat.com> wrote:
> >
> >> BTW, will this two patch depend on the others in this patch series ?
> > Yes.  You'll need patches that affect TCP at least so that TCP supports
> > MSG_SPLICE_PAGES, so 04-08 and perhaps 09.  It's also on top of the
> > patches that remove ITER_PIPE on my iov-extract branch, but I don't think
> > that should affect you.
> 
> Why I asked this is because I only could see these two ceph relevant patches
> currently.

Depends on how you defined 'relevant', I guess.  Only two patches modify ceph
directly, but there's a dependency: to make those work, TCP needs altering
also.

David